nuclei: Improper Verification of Cryptographic Signature
CVE-2026-92718 is a high-severity improper verification of cryptographic signature vulnerability in nuclei from ProjectDiscovery, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, but only if a user takes part, for example by opening a link or file. The record lists version 3.11.1 as the first without the flaw, so updating nuclei to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.12% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update nuclei to 3.11.1 or a later version.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Projectdiscovery | nuclei | 3.7.0 up to, but not including, 3.11.1 | 3.11.1 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H. Scored by CNA (vulncheck.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.0 | High | CNA (vulncheck.com) |
| CVSS 3.1 | 7.3 | High | CNA (vulncheck.com) |
Official description
Nuclei versions before 3.11.1 cache template signature verification based only on file modification time without content checksums. Attackers can replace verified templates with unsigned malicious content and restore the original modification time to bypass signature checks and execute arbitrary operating system commands.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Other references
- github.com/projectdiscovery/nuclei
- github.com/projectdiscovery/nuclei/blob/v3.11.0/pkg/catalog/index/metadata.go#L78-L84
- github.com/projectdiscovery/nuclei/blob/v3.11.0/pkg/templates/compile.go#L610-L624
- github.com/projectdiscovery/nuclei/issues/7663
- vulncheck.com/advisories/nuclei-from-3.7.0-before-3.11.1-template-signature-bypass-via-modification-time-only…
Other vulnerabilities in nuclei
- 7.5 High severity
- 7.8 High severity
- 7.4 High severity
- 7.4 High severity
- 7.5 High severity
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 7.4 High severity
- 7.7 High severity
- 7.1 High severity
- 7.7 High severity
- 9.1 Critical severity
- 8.3 High severity
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